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From "Martin Sebor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (STDCXX-755) [HP aCC 6.16] Potential null pointer dereference in locale.cpp
Date Thu, 03 Apr 2008 18:24:24 GMT

    [ https://issues.apache.org/jira/browse/STDCXX-755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585221#action_12585221
] 

Martin Sebor commented on STDCXX-755:
-------------------------------------

Hmm. I see a bunch or remarks and a couple of instances of warning #2177 but no #20200. I
already silenced the remark #4300 from <iomanip> in [r643078|http://svn.apache.org/viewvc?view=rev&revision=643078].
Remark #4298  from _localedef.h is annoying and causes a lot of noise in many compilations
(by my count there were 95 instances of it as of last Friday) but I haven't been able to bring
myself to uglify the code enough to silence it yet...

{noformat}
aCC -c    -mt -I$(TOPDIR)/include -I$(BUILDDIR)/include  -AA  +O2  +DD64 +w +W392 +W655 +W684
+W818 +W819 +W849 +W2193 +W2236 +W2261 +W2340 +W2401 +W2487 +W4227 +W4229 +W4231 +W4235 +W4237
+W4249 +W4255 +W4272 +W4284 +W4285 +W4286 +W4296 +W4297 +W3348   $(TOPDIR)/util/locale.cpp
"$(TOPDIR)/include/iomanip", line 90: remark #4300-D: Overflow while computing constant in
left shift operation
              & ~(_RWSTD_IOS_BASEMASK << _RWSTD_IOS_BASEOFF)
                                         ^

"$(TOPDIR)/util/locale.cpp", line 244: remark #4271-D: type conversion may lose sign
                  loc_path = std::string (env_val, slash - env_val);
                                                   ^

"$(TOPDIR)/include/loc/_localedef.h", line 160: remark #4298-D: addition result could be truncated
before cast to bigger sized type
          return (wtolower_off - wtoupper_off) / sizeof (__rw_upper_elm);
                               ^

"$(TOPDIR)/include/loc/_localedef.h", line 164: remark #4298-D: addition result could be truncated
before cast to bigger sized type
          return (wmask_off - wtolower_off) / sizeof (__rw_lower_elm);
                            ^

"$(TOPDIR)/include/loc/_localedef.h", line 168: remark #4298-D: addition result could be truncated
before cast to bigger sized type
          return charmap_off - codeset_off;
                             ^

"$(TOPDIR)/include/loc/_localedef.h", line 172: remark #4298-D: addition result could be truncated
before cast to bigger sized type
          return wtoupper_off - charmap_off;
                              ^

"$(TOPDIR)/include/loc/_localedef.h", line 122: remark #4299-D: multiply result could be truncated
before cast to bigger sized type
          return *(_RWSTD_ARRAY_ELM (wchar_t, wchar_off, off * 2));
                                                             ^

"$(TOPDIR)/include/loc/_localedef.h", line 128: remark #4298-D: addition result could be truncated
before cast to bigger sized type
          return *(_RWSTD_ARRAY_ELM (wchar_t, wchar_off, off * 2 + 1));
                                                                 ^

"$(TOPDIR)/util/locale.cpp", line 1419: remark #4298-D: addition result could be truncated
before cast to bigger sized type
               i < num_punct_st->punct_ext_off - num_punct_st->grouping_off - 2;
                                                                            ^

"$(TOPDIR)/util/locale.cpp", line 1580: remark #4298-D: addition result could be truncated
before cast to bigger sized type
               i < mon_punct_st->punct_ext_off - mon_punct_st->grouping_off - 2;
                                                                            ^

"$(TOPDIR)/util/locale.cpp", line 788: warning #2177-D: function "print_c_lc_collate" was
declared but never referenced
  print_c_lc_collate ()
  ^

"$(TOPDIR)/util/locale.cpp", line 796: warning #2177-D: function "get_wchar_from_offset" was
declared but never referenced
  get_wchar_from_offset(unsigned int offset,
  ^
{noformat}

> [HP aCC 6.16] Potential null pointer dereference in locale.cpp
> --------------------------------------------------------------
>
>                 Key: STDCXX-755
>                 URL: https://issues.apache.org/jira/browse/STDCXX-755
>             Project: C++ Standard Library
>          Issue Type: Sub-task
>          Components: Test Driver
>    Affects Versions: 4.2.0
>         Environment: $ uname -sr && aCC -V
> HP-UX B.11.31
> aCC: HP C/aC++ B3910B A.06.16 [Nov 26 2007]
>            Reporter: Scott (Yu) Zhong
>            Assignee: Travis Vitek
>             Fix For: 4.2.1
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> aCC -c    -mt -I/amd/devco/scottz/stdcxx/4.2.x/include -I/build/scottz/12d/include  -AA
 +O2  +DD64 +w +W392 +W655 +W684 +W818 +W819 +W849 +W2193
> +W2236 +W2261 +W2340 +W2401 +W2487 +W4227 +W4229 +W4231 +W4235 +W4237 +W4249 +W4255 +W4272
+W4284 +W4285 +W4286   /amd/devco/scottz/stdcxx/4.2.x/u
> til/locale.cpp
> "/amd/devco/scottz/stdcxx/4.2.x/tests/src/locale.cpp", line 369, procedure rw_locales:
warning #20200-D: Potential null pointer dereference through slocname is detected (null definition:/amd/devco/scottz/stdcxx/4.2.x/tests/src/locale.cpp,
line 364)
> "/amd/devco/scottz/stdcxx/4.2.x/tests/src/locale.cpp", line 461, procedure rw_locales:
warning #20200-D: Potential null pointer dereference through  return of call to malloc is
detected (null definition:/amd/devco/scottz/stdcxx/4.2.x/tests/src/locale.cpp, line 458)

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